The quality of indoor atmospheres is a complex function of a number of variables which include outdoor levels of pollutants, indoor generation of pollutants, permeability of the building, meteorology, and type of ventilation or air conditioning system and its method of operation. In a study for the National Air Pollution Control Administration (NAPCA), The Research Corporation of New England (TRC) (Formerly The Travelers Research Corporation) conducted a 20 month study of indoor/outdoor air pollutant relationships at a number of buildings in and around Hartford Connecticut. Some of the early results of this study were presented previously.

Other work on the subject of indoor/outdoor air pollutant relationships has been reported in the technical literature.

This paper will be limited essentially to an analysis of results obtained in two air conditioned office buildings although the entire research program also included studies of two non-air-conditioned public buildings and two non-airconditioned private homes. The field sampling program encompassed three seasons, the summer and fall of 1969, and the late winter (January-March) of 1970.